#include<stdio.h>
int main()
{
float num1,num2;
char operation;
 scanf("%f%c%f",&num1,&operation,&num2);
if(operation=='+')
      printf("%f\n",num1+num2);
if(operation=='-')
      printf("%f\n",num1-num2);
if(operation=='*')
      printf("%f\n",num1*num2);
if(operation=='/')
      printf("%f\n",num1/num2);
return 0;
}
